I Dont Know How She Does It follows a Boston-based working mother trying desperately to juggle marriage, children, and a high-stress job. Kate Reddy devotes her days to her job with a Boston-based financial management firm. At night she goes home to her adoring, recently-downsized architect husband Richard and their two young children. Its a non-stop balancing act, the same one that Kates acerbic best friend and fellow working mother Allison (Christina Hendricks) performs on a daily basis, and that Kates super-brainy, child-phobic young junior associate Momo (Olivia Munn) fully intends to avoid. When Kate gets handed a major new account that will require frequent trips to New York, Richard also wins the new job hes been hoping for-and both will be spreading themselves even thinner. Complicating matters is Kates charming new business associate Jack Abelhammer (Brosnan), who begins to prove an unexpected source of temptation.